The part was organized in 1900 by Ricardo Flores Magón,
Enrique Flores Magón, Librado Rivera, Juan Sarabia, and Antonio Horcasistas to
oppose the dictatorship of Porfirio Díaz. It met in San Luis Potosí, San Luis
Potosí to write a platform. The party was anticlerical and called for liberty
of the press, fair voting, the return to and full implementation of the Laws of
the Reform, the right to strike, and municipal liberty. Its newsparer was Regeneración.
The Magón brothers chafed at what hey believed the timidity
and false analysis of the party. They were anarchists. Their agitation landed
them in jail. When Ricardo Flores Magón came out of prison in October, 1903, he
headed to the United States. There, he continued to organize and plot against
the Díaz dictatorship.